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(No Model.) 8 Sheets-Sheet 1.

W. F. BARNES. DRILLING MACHINE.

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(No Model.) 3 Sheets-Sheet 2.

W. F. BARNES.

DRILLING MAGHINE.

No. 516,150. Patented Mar.- 6, 1894.

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W. P. BARNES. DRILLING MACHINE.

No. 516,150.. Patented Mar. 6, 1894.

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UNITED STATES WILLIAM F. BARNES, OF ROCKFORD, ILLINOIS, ASSIGNOR TO THEW. F. &

PATENT OFFICE.

JOHN BARNES COMPANY, OF SAME PLACE.

DRILLING-MACHINE.

SPECIFICATION forming part Of Letters Patent N0. 516,150, dated March 6,1894.

Application filedDecember 7,1893- Serial No. 493,054- (No model.)

To aZZ whom it may concern:

Be it known that I, WILLIAM F. BARNES, a

citizen of the United States, residing at Rockford, in the county ofWinnebago and State of Illinois, have invented certain new and usefulImprovements in Drilling-Machines, of which the following is aspecification. The object of this invention is to form a connectionbetween the driving power and the feed through the spindle having aconnection with the rack of the drill spindle in such a manner as not tointerfere with the spindle being operated by hand.

The further object of my invention is to antomatically stop the feed ofthe drill by disconnecting the parts forming a connection between thedriving power and the drill spindle.

In the accompanying drawings, Figure 1, is a side elevation of adrilling machine in which the feed has a connection with the drivingpower. Fig. 2, is a side elevation in which the feed is operated byhand. Figs. 3, 4, 5, and 6 are detached views of the parts forautomatically stopping the feeding of the drill.

The drilling machine represented in the drawings consists of the mainframe 1, supporting a driving shaft 2, in its upper portion and drillspindle 3, in its front portion, said driving shaft and drill spindlehaving a rotative connection, said parts being of a wellknownconstruction and are herein shown in order that my improvements may bebetter understood. I The drill spindle is provided with the usualtoothed rack 4, which meshes with a pinion connected to the horizontalshaft 5, by means of which the spindle is raised or lowered during theprocess of drilling and it is with this shaft that my improvements havea connection.

In Letters Patent No. 270,537, dated J anuary 9, 1883, is shown andclaimed the construction of the lever for oprating the feed shown inthis application consisting of a screw gear 6, mounted on the end of theshaft 5, the lever 7, provided with a slotted end 8, within which isreceived the screw gear wheel, this end of the lever being mounted uponthe shaft which acts as its pivot. A worm 9, meshes with the teeth ofthis screw gear and is located upon a shaft 10, supported in bearings inthe lever proper, said shaft having a pivotal connection with the lever.A thumb lever 11, has a connection with the shaft 10, by means of whichthe worm is raised out of mesh with the screw gear. This form ofconnection as thus far described acts as a ratchet wheel and pawl bymeans of which the shaft may be rotated in every direction to raise orlower the drill spindle.

To the end of the shaft 10, upon which the worm 9, is mounted is secureda hand wheel 12,by means of which the screw gear may be rotated in everydirection thereby raising or lowering the drill spindle; to suchconstruction no claim is laid in this application.

A horizontal bearing 13,and vertical bearing 14 are supported by an arm15, surrounding a bushing within which is located the shaft 5, and anarm 16 connected with the main frame of the machine.

In the horizontal bearing 13, is located a shaft 17 upon one end ofwhich is secured a worm 18, and upon its other end is secured a conepulley 19. This cone pulley has a connection with the cone pulley 20,mounted on the driving shaft 2, by a belt 21.

In the vertical bearing 14, is located a shaft 22, upon the upper end ofwhich is secured a screw gear 23, and to its lower end is secured amiter gear wheel 24, this miter gear wheel meshes with a miter gearwheel 25, secured to the end of the shaft 10, carrying the worm 9. Bythis arrangement a connection is formed between the driving shaft anddrill spindle through the medium of cone pulleys 19 and 20 belt 21, worm18 screw gear 23, miter gear wheels 24 and 25, worm 9, screw gear 6, andhorizontal shaft 5, so that the rotary movement of the driving shaftwill impart a reciprocating movement to the drill spindle and sucharrangement will not interfere with the spindle, being operated by thehand lever, as in the oscillatory movement of the lever the miter gearwheels will unmesh. Owing to the teeth of these miter gear wheels beingrounded they will readily mesh while the miter tooth wheel 24, is inmotion. This vertical shaft 22 has a lengthwise movement in its bearing,in order that the miter gear wheel 24, may drop, thereby becomingdisengaged from the miter gear wheel 25,'in order that the automaticfeed of the drill spindle may be stopped when it is desirable to operatethe feed by means of the hand wheel 12. This shaft is held in itsuppermost position by linked connection with a stationary part of themachine. This linked connection consists of an arm 26, having a pivotalconnection with an arm 27, extending from the lower end of the bearing14: and has an extension 28 upon which the lower end of the shaft 22rests. The outer end of this arm 26 has a pivotal connection with an arm29, the free end of which is in handle form, the end of this arm nearits pivotal connection with the arm 26, has a downward extension 30, thefront face side of which is provided with a notch 31 and a spring 32hearing against this extension and an extension 33 from the arm 26. Aprojection 34, extends from the rear face of a boss. By means of thislinked connection the miter gear wheels are held in an engagement, whilethe notch 31 of the extension rests upon the projection 34:, and the arm28 will be located as shown in Fig. 3, and by pressing upon the handleportion of the arm 29 the extension 30 will become disengaged from theprojection 34, allowing the arm 28 to descend; alsoallowing the mitergear wheel 24 to descend out of mesh with the miter gear wheel 25,thereby cutting off the feed connection between the driving shaft anddrill spindle as shown in Fig. 4. In the descending movement of theshaft 22, the screw gear 23 will remain in mesh with the worm 18 andcontinue to revolve.

In order that the feed connection between the driving shaft and drillspindle may be an tomatically broken, I have formed a trip,

shown at Fig.6, consisting of a clamp held in place by a set screw 35and having a downward extending end 36. This trip is adjnstable theproper distance along the tooth rack 4, of a drill spindle and clampedin position, and when in position its downward extending end willoverride the arm 29 nearits free end, and as the drill spindle descendsthis trip will co me in contact with the arm 29, depressing it, causingit to release its hold upon the projection 34, thereby allowing thedescent of the miter gear wheel 24, causing a breakage in the feedconnection between the driving shaft and drill spindle.

I claim as my invention- 1. The combination of a worm, a hand lever inwhich the worm is mounted,a worm wheel in engagement with the worm, andmeans whereby the worm maybe connected withthe driving power of thedrill.

2. The combination of aworm,ahandlever in which the worm is mounted andis capable of use as a pawl to engage the worm wheel, a gear mounted onthe end of the worm shaft, and means whereby said gear may be made tomesh with a gear having a connection with the driving power of thedrill.

3. The combination of a worm, a hand lever in which the worm is mountedand capable of use as a pawl to engage a Worm wheel, a connectionbetween the worm and driving power of the drill, and means forautomatically breaking such connection.

WILLIAM F. BARNES.

Witnesses:

A. O. BEHEL, E. BEHEL.

